High Elastic EPDM Rubber O Ring, Anti-Aging Leak Proof Sealing Ring, Optional NBR FKM Silicone for Pipe Fitting & Machinery Maintenance

Our EPDM O-rings are precision-molded rubber sealing rings made from high-quality EPDM (Ethylene Propylene Diene Monomer) rubber. We also supply NBR, Silicone, and FKM material options to satisfy different working conditions. EPDM O-rings stand out for outstanding resistance to ozone, weather, aging, hot water, and steam. They maintain stable elasticity and reliable sealing performance over a wide temperature range. With excellent leak-proof properties, they effectively prevent liquid and gas leakage. These EPDM sealing rings are widely applied in plumbing, water treatment, HVAC, pneumatic systems, and automotive components. Custom sizes and specifications are available for industrial wholesale and engineering projects.

• Made of high-grade EPDM rubber, with optional NBR, Silicone, and FKM materials for different working environments.
• Outstanding resistance to ozone, weathering, and aging for a long service life outdoors.
• Excellent resistance to hot water, steam, and polar media — ideal for water system sealing.
• Good elasticity and compression recovery, maintaining stable sealing performance under repeated compression.
• Wide operating temperature range for reliable sealing in both low and high temperature conditions.
• Leak-proof sealing effect that effectively prevents gas and liquid leakage.
• Custom sizes and hardness available to meet diverse industrial requirements.

• Water treatment systems: water pumps, pipe joints, water valves, and filter equipment sealing.
• HVAC industry: air conditioners, heating equipment, and refrigeration pipeline connections.
• Pneumatic equipment: air cylinders, air valves, and air compressor sealing parts.
• Automotive components: cooling systems, windshield washers, and non-oil contact sealing positions.
• Plumbing & sanitary: faucet, shower, and water pipeline sealing applications.
• General industry: outdoor machinery, solar equipment, and ozone-exposed working conditions.

• Superior resistance to ozone, UV light, and weathering compared with NBR and natural rubber — ideal for outdoor applications.
• Excellent hot water and steam resistance, much better than FKM and NBR in aqueous media service.
• Good resistance to polar chemicals such as alcohols and ketones, where NBR performs poorly.
• Broader low-temperature flexibility than FKM, keeping elasticity under cold conditions.
• Not suitable for mineral oils and hydrocarbon fuels; for oil service, we recommend NBR or FKM alternatives.
• Longer service life in aging environments than silicone rubber under continuous hot water exposure.

EPDM O-rings are a reliable choice for sealing in harsh environments where oxidation, water, or temperature fluctuations are concerns. For oil or fuel exposure, alternative materials like Nitrile (NBR) or Fluorocarbon (FKM) are recommended.

For color, we can manufacture to customer requirements. If you need colored O-rings, please provide a Pantone number.

We can also produce Automotive Rubber Seals, Connector Rubber Seals, Power Tool Rubber Seals, Valve Rubber Seals, Pipe Rubber Seals, Semiconductor Rubber Seals, Hydraulic Pneumatic Rubber Seals, Pump Rubber Seals, Oil and Gas Seals, Food Grade Rubber Seals, Medical Rubber Seals, Chemical Equipment Rubber Seals, and more.

• 1. Since 2006, focused on rubber seals, especially for auto parts.
• 2. Certificates: ISO9001, IATF16949, ISO14001, ISO45001, ISO 13485.
• 3. Two factories covering more than 18,000㎡, including a 600㎡ clean room, with 300 workers.
• 4. Over 10,000 mold sets, including approximately 5,000 O-ring molds.
• 5. O-ring series covers American standard (AS568), Japanese standard (JIS), national standard (GB), and a large number of customized non-standard parts.
• 6. Materials: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR. The rubber materials used meet the requirements of ROHS2.0 and REACH235.
• 7. Material Certificates: FDA, ROHS, REACH, UL157, CP65, WRC, EN549, EN45545.
• 8. Products are widely used in automotive parts, electronic connectors, valves, pneumatics, power tools, new energy, medical equipment, electronic products, and other fields.
• 9. The company has introduced HRP, ERP, and other systems since its inception.
• 10. Labor cost, raw material procurement, production process, and product quality are comprehensively and scientifically controlled.

• ☆ Professional OEM & ODM with 30+ years of rubber sealing manufacturing experience.
• ☆ Full range of molds — over 10,000+ sets.
• ☆ Professional team providing efficient trading service.
• ☆ Strict quality control — quality guarantee.
• ☆ Owned testing laboratory with sophisticated test equipment.
• ☆ Advanced equipment: 50+ curing machines, 8 CCD automatic inspection machines, 8 all-in-one machines.

Ruichen has cooperated with many superior customers worldwide. We have a complete system and excellent productivity to serve you.

We provide rubber manufacturing technology consultation and product R&D (OEM & ODM).

• 1. Cheap mold fee.
• 2. Rubber molding for various sizes and shapes — possible to make.
• 3. Custom personalized logo accepted.
• 4. Over 10,000 kinds of custom molded rubber established and consummated.
• 5. Various materials: Silicone, EPDM, NBR, FKM (Viton), HNBR, NR, Neoprene (CR), SBR, MPU, etc.
• 6. Different hardness: 30 to 90 Shore A.
• 7. Various colors: translucent, black, white, blue, green, red, etc.

Many big companies select Ruichen for their rubber seals and customized rubber parts because we always satisfy them in quality, price, delivery, and service. At the same time, we attach great importance to small customers in niche markets. Whether your purchase quantity is big or small, you are our valuable partner.

• • High Quality: We continue to manufacture high-quality products for all customers and pursue 100% customer satisfaction, which has become one of our core competencies.
• • Profession: We have rich experience in materials, products, and production, along with excellent international trade and language communication skills.
• • Best Services: From quoting, sampling, production, and shipping to after-sales, our sales team will provide you with the best service so you can rest assured completely.
• • 10,000+ Projects Delivered: Over 10K projects have been sent to customers worldwide in recent years, and we have received countless positive comments.
• • Low Price: Our customers can obtain maximum profits through the ISO management system and intelligent manufacturing to continuously reduce our costs.
• • Massive Capacity: Our in-house facilities allow us to get your projects done fast. Thanks to our strong relationships with rapid materials partners, our capacity is not limited.
• • Fast Delivery: Unlimited capacity, experienced engineers, and a flexible production system allow us to create your seals and production parts in a short period.
• • 1,000+ Happy Customers: We aim to keep every customer happy with reliable quality, fast turnaround, and excellent services. We want all our new customers to become long-term customers.